Quiet Classroom - Noise Alarm is an Android app developed by FunDip that falls under the Utilities & Tools category. It is a free app that helps you keep the noise level in check and is perfect for classrooms, libraries, or any other quiet workspace. The app allows you to choose your own noise level, which is saved for your convenience, and click the start button. When the noise level rises above the selected level, an alarm of your choice will sound, indicating to the audience to decrease their sound level.

The app has a simple interface with start/reset buttons and a scale to choose your own sound level. It also has different alert sounds with varying pitch levels. The app automatically stops when the sound level decreases, and it is ads-free with a small size.